Umfang:
xvi, 88 Seiten
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Illustrationen, Diagramme
Inhalt:
The present work focuses on the preparation and characterisation of various nanoplastic reference material candidates. Nanoplastics are plastic particles in a size range of 1 − 1000 nm. The term has emerged in recent years as a distinction from the larger microplastic (1 − 1000 μm). Since the properties of the two plastic particles differ significantly due to their size, it is important to have nanoplastic reference material. This was produced for the polymer types polypropylene (PP) and polyethylene (PE) as well as poly(lactic acid) (PLA). A top-down method was used to produce the nanoplastic for the polyolefins PP and PE (Section 3.1). The material was crushed in acetone using an Ultra-Turrax disperser and then transferred to water. This process produces reproducible results when repeated, making it suitable for the production of a reference material candidate. The resulting dispersions were investigated using dynamic and electrophoretic light scattering. The dispersion of PP particles gave a mean hydrodynamic diameter Dh = 180.5±5.8 nm with a PDI = 0.08±0.02 and a zeta potential ζ = −43.0 ± 2.0 mV. For the PE particles, a diameter Dh = 344.5 ± 34.6 nm, with a PDI = 0.39 ± 0.04 and a zeta potential of ζ = −40.0 ± 4.2 mV was measured. This means that both dispersions are nanoplastics, as the particles are 〈 1000 nm. [...]
Anmerkung:
Dissertation Universität Potsdam 2023
Weitere Ausg.:
Erscheint auch als Online-Ausgabe Hildebrandt, Jana Studies on nanoplastics for the preparation of reference materials Potsdam, 2023
Sprache:
Englisch
Schlagwort(e):
Hochschulschrift
;
Hochschulschrift
Mehr zum Autor:
Thünemann, Andreas F. 1964-
Mehr zum Autor:
Taubert, Andreas 1972-
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